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Contribution of negative-energy states to the E2M1 polarizability of optical clocks

Fang-Fei Wu, Ting-Yun Shi, Wei-Tou Ni, and Li-Yan Tang
Phys. Rev. A 108, L051101 – Published 9 November 2023
Physics logo See synopsis: Solution for Atomic Clock Puzzle

Abstract

We investigate the contribution of negative-energy states on the E2 and M1 polarizabilities for the S01 and P03 states of the Sr clock and find that they dominate the E2M1 polarizability difference. Our calculated result is 7.74(3.92)×105 a.u., which resolves the sign inconsistency between theory and experiment. Additionally, we extend our method to other optical clocks, confirming the crucial role of negative-energy states in determining the M1 polarizability.

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  • Received 16 June 2023
  • Accepted 19 September 2023

DOI:https://doi.org/10.1103/PhysRevA.108.L051101

©2023 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

synopsis

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Solution for Atomic Clock Puzzle

Published 9 November 2023

The resolution of a major discrepancy between theory and experiment for strontium atomic clocks could help improve the precision of these timekeepers.

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Authors & Affiliations

Fang-Fei Wu, Ting-Yun Shi, Wei-Tou Ni, and Li-Yan Tang*

  • State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China

  • *lytang@apm.ac.cn

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Issue

Vol. 108, Iss. 5 — November 2023

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